Exception reading SSL message: java.io.EOFException: Connection closed by remote host

Hello,

We configured webhook listener on DocuSign to receive event notifications, enabled Mutulal TLS and configured DocuSign chain certificate in Configure Client Certificates on IS. We’re seeing below error in IS logs when DocuSign try to send event notification to our REST API. We’re using 10.5 version and applied to core fix IS_10.5_Core_Fix4.
I’m not sure what is the issue here. can someone please provide guidence ?

Link to DocuSign documentation : https://www.docusign.com/blog/dsdev-mutual-tls-stuff-know

Below Extended setting enabled on IS:

watt.net.ssl.client.useJSSE=true
watt.net.jsse.client.enabledProtocols=TLSv1,TLSv1.1,TLSv1.2
watt.net.jsse.server.enabledProtocols=SSLv2Hello,TLSv1,TLSv1.1,TLSv1.2

Error:

INFO | jvm 2 | 2021/10/26 15:52:59 | ssl_debug(1): Exception reading SSL message: java.io.EOFException: Connection closed by remote host.
INFO | jvm 2 | 2021/10/26 15:52:59 | ssl_debug(1): Shutting down SSL layer…
INFO | jvm 2 | 2021/10/26 15:52:59 | ssl_debug(1): Read 536 bytes in 8 records, 287 bytes net, 35 average.
INFO | jvm 2 | 2021/10/26 15:52:59 | ssl_debug(1): Wrote 1994 bytes in 2 records, 1926 bytes net, 963 average.
INFO | jvm 2 | 2021/10/26 15:52:59 | ssl_debug(1): Closing transport…
INFO | jvm 2 | 2021/10/26 15:52:59 | ssl_debug(1): Closing transport…
INFO | jvm 2 | 2021/10/26 15:52:59 | ssl_debug(76): Starting handshake (iSaSiLk 3.03)…
INFO | jvm 2 | 2021/10/26 15:52:59 | ssl_debug(76): Remote client:10.250.32.26:6882, Timestamp:Tue Oct 26 15:52:59 CDT 2021
INFO | jvm 2 | 2021/10/26 15:52:59 | ssl_debug(76): Sending secure renegotiation cipher suite
INFO | jvm 2 | 2021/10/26 15:52:59 | ssl_debug(76): Sending v2 client_hello message, requesting version 3.1…
INFO | jvm 2 | 2021/10/26 15:52:59 | ssl_debug(76): Received v3 server_hello handshake message.
INFO | jvm 2 | 2021/10/26 15:52:59 | ssl_debug(76): Server selected SSL version 3.1.
INFO | jvm 2 | 2021/10/26 15:52:59 | ssl_debug(76): Server created new session AE:20:83:BC:31:79:7A:86…
INFO | jvm 2 | 2021/10/26 15:52:59 | ssl_debug(76): CipherSuite selected by server: TLS_RSA_WITH_AES_256_CBC_SHA
INFO | jvm 2 | 2021/10/26 15:52:59 | ssl_debug(76): CompressionMethod selected by server: NULL
INFO | jvm 2 | 2021/10/26 15:52:59 | ssl_debug(76): Received certificate handshake message with server certificate.
INFO | jvm 2 | 2021/10/26 15:52:59 | ssl_debug(76): Server sent a 2048 bit RSA certificate, chain has 3 elements.
INFO | jvm 2 | 2021/10/26 15:52:59 | ssl_debug(76): Received server_hello_done handshake message.
INFO | jvm 2 | 2021/10/26 15:52:59 | ssl_debug(76): Sending client_key_exchange handshake message (2048 bit)…

Thanks,
Surendra.